Competent! There's a lot of nice touches: bullets colliding with each other, a flow of enemies determined by success rate, the field resetting after you die so you don't get rehit by old bullets, etc. etc.
The ship art is also quite good; it's chic, like 2001.
It's a bit long for the simplicity, especially for a jam game. The difficulty increases quite slowly, and the novelty begins to wear off quickly.
The audio is a tad loud.
Great work. Congratulations on the submission!